Telephone system



April 1963 R. B. TROUSDALE 3,087,021

TELEPHONE SYSTEM Original Filed July 28, 1952 35 Sheets-Sheet 2 Zj a'sz Link-I4 Um'fs Pulses Urziis I Pulse:

[Mir Fu ies Unzjzs I Pulses Com/v- Flygfl? Egg Tens 1 Puke:

CONN- ECTO/P 12b Ens IN VEN TOR.

5 5 Babe/Z 5 7701154416 52: 57x flowed,

aiiorrzqg April 23, 1963 Criginal Filed July 28, 1952 Ten; D

C'amzeclon Pals;

Line

6'1 rzaif R. B. TROUSDALE TELEPHONE SYSTEM 35 Sheets-Sheet 5 advance/- Bus Loci 6'1 rcuzi cam 29,

IN V EN TOR.

Poberi 5 Ji'azzsdale By 6 6o 0- L Clz'iamg I A ril 23, 1963 R. B. TROUSDALE TELEPHONE SYSTEM 35 Sheets-Sheet 6 Original Filed July 28, 1952 QQNQQEHPQQ M 3 Esq INVENTOR. Babe/'23 B. fioasaale BY 26 I 604023-31 Cliiorrzgy 35 Sheets-Sheet 7 R. B. TROUSDALE TELEPHONE SYSTEM K Q ESQQ EQ wa April 23, 1963 original Filed July 28, 1952 INVENTOR. Pabcri B. Trowdalc BY 9% 46mm.

diZar/rqy April 23,

Original Filed July 28, 1952 R. B. TROUSDALE 3,087,021

TELEPHONE SYSTEM 35 Sheets-Sheet 8 jig/6 ja g/a 7g /9 INVENTOR.

R. B. TROUSDALE TELEPHONE SYSTEM 35 Sheets-Sheet 10 April 23, 1963 Original Filed July 28, 1952 Fens Eeqz'sier 7212s Eeqz'sicr Pulsgr 2l0 fla'uan er-zdo I +/5o u /oo v. c

April 23, 1963 R. B. TROUSDALE TELEPHONE SYSTEM 35 Sheets-Sheet 12 Original Filed July 28, 1952 71:22:: Dz'gQ. Register -2// ig-flan! U/zz'is' Pulse Ring 20 55L UmtsDLqzi Eeqistcr INVENTOR. Poberi B fi'ozzsdale BY 74. $0 63 Jigr 9 April 23, 1963 R. B. TROUSDALE 3,087,021

TELEPHONE SYSTEM Original Filed July 28, 1952 35 Sheets-Sheet 13 1003 100.9 lb/a I r-IF: l-IF BY flowedl.

3 a e h S 5 :0

Original Filed July 28, 1952 COIIz/eFsaZzb/Y 727721??? Puke Gaze/"afar -57 INVENTOR. Robert B. fiousdalc BY $0 141-68...

April 23, 1963 R. B. TROUSDALE 3,087,021

TELEPHONE SYSTEM Original Filed July 28, 1952 35 Sheets-Sheet 1'7 zaaj he as fr. Drive i 25 Callz' Linc Pecons'irzzcior Czrcuzi- Z08 H50 f/JoV.

IN VEN TOR.

BY J4. ow ah April 23, 1963 R. B. TROUSDALE 3,

TELEPHONE SYSTEM Original Filed July 28, 1952 35 Sheets-Sheet 18 7 Link in Basel Tone M 62/18/07 3 '2 .1 Z

' INVENTOR. ,Poberi B. 7i'ousdalc April 23, 1963 R. B. TROUSDALE 3,

TELEPHONE SYSTEM Original Filed July 28, 1952 35 Sheets-Sheet 19 Dri ve -25 &

' 5%??? $542"; H I loan IN VEN TOR.

"f ,Pobem" 5 #0251076 April 1963 R. B. TROUSDALE 3,087,021

TELEPHONE SYSTEM 35 Sheets-Sheet 20 Original Filed July 28, 1952 onuersafwrz 77212271 4951 7222a 'erzemior 56 Code Buses ,2 dike Zine Disinlzz {0r Corzmzazz yaz vmelzi /7 INVENTOR. Baberl 5. fiausaaic BY Q l o'ureh 

1. IN AN AUTOMATIC TELEPHONE SYSTEM, A PLURALITY OF LINES HAVING INDIVIDUALLY ASSIGNED THERETO DIFFERENT TIME POSITIONS IN REPETITIVE TIME POSITION FRAMES, MEANS FOR MARKING CERTAIN ONES OF SAID LINES AS TRUNKS BY DEVELOPING TRUNK MARKING SIGNALS IN THE TIME POSITIONS INDIVIDUALLY ASSIGNED THERETO, A PLURALITY OF LINE SELECTING AND SIGNAL TRANSMISSION LINKS COMMON TO SAID LINES, EACH OF SAID LINKS INCLUDING MEANS CONTROLLED IN PART BY SAID TRUNK MARKING SIGNALS AND DIRECTIVELY CONTROLLABLE OVER ANY CALLING ONE OF SAID LINES FOR SELECTING AN IDLE ONE SAID TRUNKS IN RESPONSE TO A CALL DIRECTED TO ONE OF THE TRUNKS IN THE TRUNK GROUP, AND MEANS INCLUDING SAID LINKS FOR SETTING UP TWO-WAY COMMUNICATION CONNECTIONS BETWEEN ANY TWO OF SAID LINES. 